Cisco TelePresence SX20 Quick Set
Administrator guide
Table of contents | Introduction | Web interface | Advanced settings | Appendices |
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Optimal definition profiles
Under ideal lighting conditions the bandwidth (call rate) requirements can be substantially reduced.
The optimal definition profile should reflect the lighting conditions in your room and the quality of the video input (camera); the better the lighting conditions and video input, the higher the profile. Then, in good lighting conditions, the video encoder will provide better quality (higher resolution or frame rate) for a given call rate.
In general, we recommend the optimal definition profile set to Medium. However, if lighting conditions are very good or bad we recommend that you test the endpoint on the various Optimal Definition Profile settings before deciding on a profile.
Go to Advanced Configuration on the web interface and navigate to Video > Input > Source [1..n] > OptimalDefinition > Profile to select the preferred optimal definition profile.
You can set a resolution threshold below which the maximum frame rate will be 30 fps.
Go to Advanced Configuration on the web interface and navigate to Video > Input > Source [1..n] > OptimalDefinition > Threshold60fps to set the threshold.
Typically used in dedicated video conferencing rooms. Requires very good lighting conditions and a good quality video input to achieve a good overall experience.
Under ideal conditions the bandwidth requirements can be reduced by up to 50% compared to Normal.
Typically used in rooms with good and stable lighting conditions and a good quality video input.
The bandwidth requirements can be reduced by up to 25% compared to Normal.This setting is typically used in office environments where the room is normally to poorly lit.
The video input quality settings must be set to Motion for the optimal definition settings to take any effect. With the video input quality set to Sharpness, the endpoint will transmit the highest resolution possible, regardless of frame rate.
Go to Advanced Configuration on the web interface and navigate to Video > Input > Source [1..n] > Quality to set the video quality parameter to Motion.
You can read more about these video settings in the Advanced settings chapter.Typical resolutions used for different optimal definition profiles, call rates and frame rates
Frame | Optimal |
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Definition |
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rate | Profile | 256 kbps | 768 kbps | 1152 kbps | 1472 kbps | 2560 kbps | 4 Mbps | 6 Mbps |
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| Normal | 512×288 | 1024×576 | 1280×720 | 1280×720 | 1920×1080 | 1920×1080 | 1920×1080 |
30 fps | Medium | 640×360 | 1280×720 | 1280×720 | 1280×720 | 1920×1080 | 1920×1080 | 1920×1080 |
| High | 768×448 | 1280×720 | 1280×720 | 1920×1080 | 1920×1080 | 1920×1080 | 1920×1080 |
| Normal | 256×144 | 512×288 | 768×448 | 1024×576 | 1280×720 | 1280×720 | 1920×1080 |
60 fps | Medium | 256×144 | 768×448 | 1024×576 | 1024×576 | 1280×720 | 1920×1080 | 1920×1080 |
| High | 512×288 | 1024×576 | 1280×720 | 1280×720 | 1920×1080 | 1920×1080 | 1920×1080 |
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D14908.01 SX20 Administrator Guide (TC5.1) 2012 FEBRUARY © 2012 Cisco Systems, Inc. All rights reserved. | www.cisco.com |